Hi,
My XC70 d5 awd automatic yearmodel 2011 has begun to leak its coolant. Leak is located to the rear of the engine (viewed from front), left side (viewed from rear), and coolant comes between engine and gearbox via left side lower engine bracket to the ground.

Leak is slow and no even what so ever. It may take day or two that it does not leak at all, or it may leak just in two days as much that I have to add coolant to expansion tank. Engine has lost coolant over the time but very, very little. Over the last year which I have owned this vehicle I have added only once or max twice the coolant. The major coolant leak begun at last week while here was the coldest winter in long long time, over -30 degrees Celcius.

Any ideas where that coolant comes from...?

Here is few pics what shows where coolant comes to ground: